/* -*-C-*-
$Id: bchgcc.h,v 9.63 2000/12/05 21:23:42 cph Exp $
Copyright (c) 1987-2000 Massachusetts Institute of Technology
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef SCM_BCHGCC_H
#define SCM_BCHGCC_H
#include "config.h"
#include "gccode.h"
#ifdef HAVE_SYS_FILE_H
# include <sys/file.h>
#endif
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef __WIN32__
# define IO_PAGE_SIZE 4096
#endif
#ifdef __OS2__
# define IO_PAGE_SIZE 4096
#endif
#ifndef IO_PAGE_SIZE
# include <sys/param.h>
#endif
#ifndef BCH_START_CLOSURE_RELOCATION
# define BCH_START_CLOSURE_RELOCATION(scan) do { } while (0)
#endif
#ifndef BCH_END_CLOSURE_RELOCATION
# define BCH_END_CLOSURE_RELOCATION(scan) do { } while (0)
#endif
#ifndef BCH_EXTRACT_CLOSURE_ENTRY_ADDRESS
# define BCH_EXTRACT_CLOSURE_ENTRY_ADDRESS EXTRACT_CLOSURE_ENTRY_ADDRESS
#endif
#ifndef BCH_STORE_CLOSURE_ENTRY_ADDRESS
# define BCH_STORE_CLOSURE_ENTRY_ADDRESS STORE_CLOSURE_ENTRY_ADDRESS
#endif
#ifndef BCH_START_OPERATOR_RELOCATION
# define BCH_START_OPERATOR_RELOCATION(scan) do { } while (0)
#endif
#ifndef BCH_END_OPERATOR_RELOCATION
# define BCH_END_OPERATOR_RELOCATION(scan) do { } while (0)
#endif
#ifndef BCH_EXTRACT_OPERATOR_LINKAGE_ADDRESS
# define BCH_EXTRACT_OPERATOR_LINKAGE_ADDRESS EXTRACT_OPERATOR_LINKAGE_ADDRESS
#endif
#ifndef BCH_STORE_OPERATOR_LINKAGE_ADDRESS
# define BCH_STORE_OPERATOR_LINKAGE_ADDRESS STORE_OPERATOR_LINKAGE_ADDRESS
#endif
extern char * EXFUN (error_name, (int));
typedef ssize_t EXFUN (file_operation_t, (int, char *, int));
extern int EXFUN (retrying_file_operation,
(file_operation_t *,
int, char *, long, long, char *, char *, long *,
int EXFUN ((*), (char *, char *))));
extern int EXFUN (io_error_retry_p, (char *, char *));
extern int EXFUN (io_error_always_abort, (char *, char *));
extern char * EXFUN (make_gc_file_name, (CONST char *));
extern int EXFUN (allocate_gc_file, (char *));
extern void EXFUN (protect_gc_file_name, (CONST char *));
struct saved_scan_state
{
SCHEME_OBJECT * virtual_scan_pointer;
unsigned long scan_position;
unsigned long scan_offset;
};
extern void EXFUN
(save_scan_state, (struct saved_scan_state * state, SCHEME_OBJECT * scan));
extern SCHEME_OBJECT * EXFUN
(restore_scan_state, (struct saved_scan_state * state));
extern void EXFUN
(set_fixed_scan_area, (SCHEME_OBJECT * bottom, SCHEME_OBJECT * top));
#ifndef O_BINARY
# define O_BINARY 0
#endif
#define GC_FILE_FLAGS (O_RDWR | O_CREAT | O_BINARY) /* O_SYNCIO removed */
#define GC_FILE_MASK 0644 /* Everyone reads, owner writes */
/* IO_PAGE_SIZE must be a power of 2! */
#ifndef IO_PAGE_SIZE
# ifdef DEV_BSIZE
# define IO_PAGE_SIZE DEV_BSIZE
# else
# define IO_PAGE_SIZE 8192
# endif
#endif
#define ALIGN_DOWN_TO_IO_PAGE(addr) \
(((unsigned long) (addr)) & (~(IO_PAGE_SIZE - 1)))
#define ALIGN_UP_TO_IO_PAGE(addr) \
(ALIGN_DOWN_TO_IO_PAGE (((unsigned long) (addr)) + (IO_PAGE_SIZE - 1)))
#define ALIGNED_TO_IO_PAGE_P(addr) \
(((unsigned long) (addr)) == (ALIGN_DOWN_TO_IO_PAGE (addr)))
extern long
gc_file_end_position,
gc_file_current_position,
gc_file_start_position;
extern unsigned long
gc_buffer_size,
gc_buffer_bytes,
gc_buffer_shift,
gc_buffer_mask,
gc_buffer_byte_shift;
extern char
gc_death_message_buffer[];
extern SCHEME_OBJECT
* scan_buffer_top,
* scan_buffer_bottom,
* free_buffer_top,
* free_buffer_bottom,
* weak_pair_stack_ptr,
* weak_pair_stack_limit,
* virtual_scan_pointer;
typedef enum { NORMAL_GC, PURE_COPY, CONSTANT_COPY } gc_mode_t;
extern SCHEME_OBJECT * EXFUN
(gc_loop, (SCHEME_OBJECT *, SCHEME_OBJECT **, SCHEME_OBJECT **,
SCHEME_OBJECT *, gc_mode_t, int));
extern SCHEME_OBJECT
* EXFUN (dump_and_reload_scan_buffer, (SCHEME_OBJECT *, Boolean *)),
* EXFUN (dump_and_reset_free_buffer, (SCHEME_OBJECT *, Boolean *)),
* EXFUN (dump_free_directly, (SCHEME_OBJECT *, long, Boolean *)),
* EXFUN (initialize_free_buffer, (void)),
* EXFUN (initialize_scan_buffer, (SCHEME_OBJECT *)),
EXFUN (read_newspace_address, (SCHEME_OBJECT *));
extern void
EXFUN (GC, (int)),
EXFUN (end_transport, (Boolean *)),
EXFUN (final_reload, (SCHEME_OBJECT *, unsigned long, char *)),
EXFUN (extend_scan_buffer, (char *, SCHEME_OBJECT *)),
EXFUN (gc_death, (long, char *, SCHEME_OBJECT *, SCHEME_OBJECT *)),
EXFUN (restore_gc_file, (void)),
EXFUN (initialize_weak_pair_transport, (SCHEME_OBJECT *)),
EXFUN (fix_weak_chain_1, (SCHEME_OBJECT *)),
EXFUN (fix_weak_chain_2, (void)),
EXFUN (GC_end_root_relocation, (SCHEME_OBJECT *, SCHEME_OBJECT *));
extern long
EXFUN (GC_relocate_root, (SCHEME_OBJECT **));
extern char
* EXFUN (end_scan_buffer_extension, (char *));
extern int
EXFUN (swap_gc_file, (int));
extern Boolean EXFUN (update_allocator_parameters, (SCHEME_OBJECT *));
extern void EXFUN (reset_allocator_parameters, (void));
/* Some utility macros */
/* These work even when scan/addr point to constant space
because initialize_free_buffer (in bchmmg.c) cleverly initializes
scan_buffer_bottom, scan_buffer_top, and virtual_scan_pointer
so that the operations below do the right thing.
These depend on (scan) and (addr) always pointing past the current
Scan pointer!
*/
#define SCAN_POINTER_TO_NEWSPACE_ADDRESS(scan) \
(((char *) virtual_scan_pointer) \
+ (((char *) (scan)) - ((char *) scan_buffer_bottom)))
#define READ_NEWSPACE_ADDRESS(loc, addr) do \
{ \
SCHEME_OBJECT * _addr, * _scaddr; \
\
_addr = (addr); \
_scaddr = (scan_buffer_bottom + ((_addr) - virtual_scan_pointer)); \
\
if ((_scaddr >= scan_buffer_bottom) && (_scaddr < scan_buffer_top)) \
(loc) = (* _scaddr); \
else if ((_addr >= Constant_Space) && (_addr < Free_Constant)) \
(loc) = (* _addr); \
else \
(loc) = (read_newspace_address (_addr)); \
} while (0)
#ifdef FLOATING_ALIGNMENT
#define BCH_ALIGN_FLOAT(address, pointer) \
{ \
while (!FLOATING_ALIGNED_P (address)) \
{ \
(address) += 1; \
(* ((pointer)++)) = (MAKE_OBJECT (TC_MANIFEST_NM_VECTOR, 0)); \
} \
}
#define BCH_ALIGN_FLOAT_ADDRESS(address) \
{ \
while (!FLOATING_ALIGNED_P (address)) \
(address) += 1; \
}
#else
#define BCH_ALIGN_FLOAT(address, pointer)
#define BCH_ALIGN_FLOAT_ADDRESS(address)
#endif
#endif /* SCM_BCHGCC_H */
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